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G. FREUND. GAP PoR FIRING BXPLOSIVB CHARGES. No. 289,768.

Patented Deo. 4, 1883.

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UNITEEA STATES ATENT rricE.

GEORGE FREUND, OF DURANGO, COLORADO.

CAP FOR FIRING EXPLOSIVE CHARGES.

SPECIFICATION forming part of Letters Patent No. 289,768, dated December4, 1883,

Application filed October 9, 1&83.

To all whom it may concern:

Beit known that I, GEORGE FREUND, of Durango, in the county of La Plataand State of Colorado, have invented a new and Improved Cap for FiringExplosive Charges, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide a new and improved cap forreceiving the fulminate for firing explosive caps in blasting rock, &c.

The invention consists in a screw-threaded tube adapted to receive thefulminate in its lower part, the lower end of the tube being closed by acap. A cap connected with a conducting-wire is screwed on the upper endof the tube, or the fuse is inserted in the tube.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the iigures.

Figure l is a longitudinal sectional elevation of' my improved cap,showing the parts detached. Figs. 2, 3, 4, 5, 6, and 7 are likesectional views of modifications of the same.

A metal tube, A, is threaded internally and externally to within a shortdistance from the lower end. A suitable fulminate, B, is placed in thesmooth lower part, O, of the tube, and the lower end of the tube isclosed by means of a cap, D. A threaded cap, E, to which aconducting-wire, F, is fastened, is screwed on the upper end of the tubeA, or'a fuse, G, is inserted in the upper screw-threaded part of' thetube A, as shown in Fig. 3. If' desired, the tube A can be serewthreadedthroughout its entire length, and the cap D can also be screw-threaded,if desired, as shown in Fig. 2. As shown in Fig. i, the screw-threadedtube A shown in Fig. 2 can be provided with an annular flange, H, atabout the middle of' its length. The tube can be screwed in agiant-candle, which is composed of' explosive material, the flange ttingon the upper end of the candle. The fulminate is ignited either byelectricity conducted through the wire F or by means of the fuse, andignites the explosive charge of' the giant-candle or the explosive inthe drill-hole.

In the modification shown in Fig. 5 the fulminate B is placed in a cap,G, which is passed into the enlarged lower end, A', of the tube A, whichtube A is screw-threaded, so

(No model.)

that the fuse G can be screwed into it. A conducting-wire, F, can bepassed through the fuse, as shown in Fig. 5. The cap C', containing` thefulminate, is inserted into the tube A from the lower end. The cap iscomposed of' two pieces only.

In the modification shown in Fig. 6 the entire tube A is screw-threaded,the f'ulminate is placed in the lower end of' the tube, and a cap, D, isscrewed on the lower end of the tube. The upper end of the tube isconnected with a conducting-wire, F.

In the modification shown in Fig. 7 the threaded tube A is shownprovided with an annular flange and with a screw-threaded point, OZ,below the said flange, whereby screwing the tube into a candle isgreatly facilitated.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A cap constructed substantially as herein shown and described, andconsisting ofa screw-threaded tube adapted to receive a fulminato in itslower part, the lower end of the tube being closed by a cap, as seti'orth.

2. rlhe combination, with a screw-threaded tube adapted to receive thef'ulminate in its lower part, of' a cap for closing the lower end of thetube, and a cap adapted to be screwed on the upper end, the upper capbeing connected with a conductingwire, substantially as herein shown anddescribed.

3. The combination, with a screw-threaded tube adapted to receive thei'ulminate in its lower part, and provided with an annular iiange at orabout its middle, of' a cap adapted to close one end, substantially asdescribed.

4. A serew-threaded tube adapted to receive a fulminate, provided withan annular iiange at or about at its middle, and with a cap secured onthe lower end ofthe tube, substantially as herein shown and described.

5. The combination, with a tube adapted to receive a fuse or adapted tobe connected with a wire, of' a cap adapted to receive the ful minatoand to be passed into the lower end of' the tube for receiving the fuseor for connection with the conductingwire, substantially as herein shownand described.

GEORGE FREUND.

NVitnesses:

A. It. LEwIs, GEO. W. MELviLLE.

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